Facing-tool.



E. S. MUMMERT & J. O. DIXON.

FACING TOOL, APPLICATION FILED MAY 4. I917.

Patented May 7,1918.

3 SHEETS-SHEET 1 Swuamtozs E. S. MUMMERT & J. 0. DIXON.

FACING TOOL.

APPLICATION FILED MAY 4, 19!?- 1,265,43. Patented May 7,1918.

3 SHEETS-SHEET 2.

E. S. MUMMERT & J. 0. DIXON.

v FACING TOOL.

APPLICATION FILED MAY 4, I917.

Patented May 7,1918.

3 SHEETSSHEET 3.

iinrr as rarnnr orrron ERVIN S. MUMMERT AND JOSEPH. O. DIXON, OFHANOVER, PENNSYLVANIA.

FACING-TOOL.

Specification of Letters Patent. 7

Patented May 7, 121-8.

Application filed May 4:, 1917. Serial No. 166,374.

To all whom it may concern:

Be it known that we, ERYIN S. MUMMERT and J osnrrr O. DIXON, bothcitizens of the United States, and residing at Hanover, county of York,and State of Pennsylvania, have invented certain new and usefulImprovements in Facing-Tools, of which the following is a specification.

Our invention relates to facing tools of the type disclosed in LettersPatent No. 1,191,813, granted to us July 18, 1916, and has for itsobjects to provide certain improvements in the construction of the headof the tool therein disclosed, as follows First, to provide an improvedtwo-way feed for the tool holder, whereby it may be fed either inwardlytoward the center of the head, or outwardly toward the peripherythereof, at will.

Secondly, to provide an improved holder for the tool.

Thirdly, to provide an improved construction of feed plungers therefor,and

Fourthly, to provide an improved pilot and drill holder.

These objects we accomplish in the manner and by the means hereinafterdescribed and claimed, reference being had to the accompanying drawings,in which Figure 1 is a front View of our improved device with the frontplate or disk removed.

Fig. 2 is a side elevation of the same shown partly broken away.

Fig. 8 is an enlarged detail side elevation of the bracket carrying thegearing for effooting the two-way feed of the tool.

Fig. 41- is an edge view of the same.

Fig. 5 is a detail elevation of the guard plate, which cooperates withthe gear carrying bracket.

Fig. 6 is a detail view of the toothed feed wheel showing its relationto the gearing for driving it in opposite directions as described.

Fig. 7 is a detail sectional view taken through said toothed feed wheeland its bearing.

Fig. 8 is a detail sectional view of a springpressed brake shoe for thetoothed feed wheel.

Fig. 9 is a detail sectional view of the stop pin for retaining thegearing intermediate the drive and feed wheels in any one of its threeadjusted positions.

Fig. 10 is a detail side elevation of the tool holder.

Fig. 11 is a detail perspective view of a tool holding sleeve.

Fig. 12 is a detail perspective view of a gib interposed between thetool holder and its slide-way for taking up wear, and also for clampingthe same against movement when desired.

Fig. .13 is a detail sectional view of one of the feed plungers.

' Fig. 141 is a face view of the feed plunger carrying disk.

Fig. 15 is a central vertical longitudinal sectional. view of the toolhead, showing one of our improved pilots positioned therein.

Fig. 16 is an end view of the shank or spindle of the lathe.

Fig. 17 is a side elevation of one of our improved pilot holders.

Fig. 18 is an end view of the same.

Fig. 19 is a side elevation of our improved tool holder having aboringtool inserted therein.

Fig. 20 is an end view of the same.

Fig. 21 is a side elevation of our improved holder for a center pointpilot, the latter being shown in position therein.

Fig. 22 is an end view of the same.

Similar numerals of reference denote corresponding parts in the severalviews.

Our improved device comprises a head 1 provided with a central bore 2,adapted to be fitted upon a shank or spindle 8, which is to be insertedinto a lathe, boring mill or like device, said head 1 being fastened tosaid shank or spindle 3 in any suitable manner, preferably being splinedthereto as at a in Fig. 15. The head 1 is provided at its front with adiametrically extending groove or guideway 5, within which a tool holder6 is mounted slidably, said holder being confined within the guideway 5by means of a front plate or disk 7 secured to the head 1 by screws 8.The holder 6 is provided with a transverse circular bore 9, adapted toreceive the tool holding sleeve 10, shown in detail in Fig. 11, saidsleeve being provided with a squared longitudinal slot 11 into which thetool 12 fits, said tool holding sleeve also being formed on its outerface with rack teeth 13 with which engages a rack pinion 141 formed on ashaft 15, the latter projecting from the end of the tool holder 6, asbest seen in Fig. 1. Also tapped into the tool holder 6 are two screws16, adapted to engage the tool 12 clamping it firmly to the tool holdersleeve 10 in any adjusted position. Mounted ina recess 17 in one face ofthe tool holder 6 is a gib 18, tapered toward its inner end and providedwith a slotted head 19 at its outer end, with which a screw 20 engages,whereby said gib may be adjusted in or out, it being understood that theslot receiving the same is tapered similarly to said gib, as shown indotted lines in Fig. 1. The tool holder 6 is adapted to be moved in aradial direction by means of a feed screw 21 having a square thread andloosely seated within a trouglnshaped smooth transverse groove 22 of thehead 1, said screw 21 protruding laterally into a threaded segmentalrecess 23 of the holder 6. The screw 21 is provided at its inner endwith a gear 24, carried upon a smaller extension 25 of said screw, saidextension projecting into a suitable bearing formed in a gear carryingbracket 26, which is bolted to the head 1, as best seen in Fig. 1 Alsomounted in suitable hearings in the bracket 26 is a toothed feed wheel27 on the shaft 28 of which to one side of said feed wheel is a gear 29smaller than the gear 24, said gear 29 being intended to rotate with thefeed wheel 27. Also mounted in said bracket 26 and fixed to the shaft 28is a swinging bracket 30 carrying two similar gears 31 and 32, adaptedalternately to be brought into mesh, through the movement of saidbracket 30, with the gear 24, it being observed that the gear 32 remainsconstantly in mesh with the gears 29 and 31. The position of thisbracket 30 is controlled by an arm 33, fixed to the shaft 28, said arm33 by its movement thus shifting the position of the shaft 28 andbracket 30, and said arm being retained in any one of the three adjustedpositions by the engagement of a pin 34 in its free end with any one ofthree apertures 35 formed in a projection 36 on the bracket 26, said pin34 being normally pressed inward by spring 37, and being capable ofbeing withdrawn through a finger piece 38 fixed thereto. In order thatthe feed wheel 27 may not move too freely, we prefer to employ a brakeshoe 39 disposed in a pocket in the bracket and pressed by a spring 40into frictional contact with one face of the feed wheel 27. The teeth ofthe feed wheel 27 are adapted to be engaged by a number of plungers 41that are mounted yieldingly in hollow plugs 42, fixed in a ring 43, saidplungers being normally pressed inwardly by springs 44, and beingcapable of retraction through finger pieces 45 fixed thereto. The ring43 is mounted loosely on the hub 46 of the head 1 and is held inposition by a collar 47 firmly driven upon the outer end of said hub.The finger piece 45 of each of the plungers 41 is provided with a pin48. adapted normally to pass into an aperture in its plug 42 so as topermit the maximum inward movement of the plunger 41, but which, whenthe plunger 41 is withdrawn by pulling upon the finger piece 45, andwhen said finger piece is turned, will abut against the outer face ofits plug 42, thereby retaining said plunger 41 in retracted orinoperative position with respect to the teeth of the feed wheel 27. Anynumber of these plungers 41 may be employed, and all or any number ofthe same may be manipulated to remain in or out of operative relationwith respect to said feed wheel 27, dependent upon the rapidity withwhich the tool is to be fed. The ring 43 is provided at its peripherywith a number of radially extending apertures 49, into which a suitablerod or other implement (not shown), may be in-- serted for maintainingsaid ring at a stand-- still while the head 1 rotates.

In order properly to support the feed wheel 27 and its gear wheels inthe bracket 26, we provide a guard plate 50 bolted to said bracket 26,and which provides a bearing for the shaft 28 of the feed wheel 27, asbest seen in Figs. 1 and 5.

As thus far described, it will be seen that upon the rotation of thehead 1 in the proper direction, the teeth of the feed wheel 27 willengage intermittently with the plungers 41 in the ring 43, as said ringdoes not participate in the rotation of said head. In this way with thebracket 30 in the position shown in Fig. 6, so that the gear wheel 32 isin mesh with gears 24 and 29, said feed wheel 27 and screw 21 will berotated intermittently, thereby gradually to advance the holder 6 andthe tool 12 carried thereby. After the latter has performed its work, itmay be returned to its original position by simply shifting the bracket30 so that the gear wheel 32 is carried out of mesh with the gear wheel24 and the gear wheel 31 brought into mesh therewith, the result beingthat the rotation of the screw 21 will be reversed, and the tool holder6 will be re turned to its initial innermost position. It will beunderstood that this shift of the bracket 30 is accomplished through arm33, and by withdrawing the pin 34 thereof from the hole 35 in which itis engaged and moving it to the hole 35 at the other side. But when itis desired to stop the feed of the screw 21 and tool holder 6, the arm33 is shifted so that its pin 34 engages the intermediate hole 35, inwhich position both of the gear wheels 31 and 33 will be out of meshwith the gear wheel 24.

4 The outer end of the lathe shank or spindle 3 is apertured at 51 andis provided with an internal bayonet slot 52 adapted to receive a pin 53near the inner end of the shank 54, which projects beyond the outer faceof the plate 7 and is adapted removably to receive thereon a thimble orpilot 55, that is capable of being received snugly within acorrespondingly central hole within the surface to be planed. By keepingin stock a number of thimbles of different outer diameters, the head 1readily may be adapted to work pieces having central holes of varyingdiameter. In case the surface to be planed has no such hole, a shaft 56,shown in Figs. 21 and 22, is provided, the same carrying a center pointpilot 57. And it will be observed that the shafts 54 and 56 are cutawayon one side at 58 to leave room for an extreme inner movement to thetool head (3. When it is desired to accomplish a center bore, a shaft59, shown in Figs. 19 and 20, may be inserted into the spindle 3, saidshaft carrying removably at its outer end a cutting tool 60, which isretained by a set screw 61.

It will be seen that our improved facing tool affords an effective meansfor facing the bosses of stationary work pieces and of performingsimilar work. In operation, the facing tool of the rotating head 1 isfed by gripping the ring 4:3 with the hand, or by inserting a pin intoone of its radial peripheral sockets l9 in such manner that the latterwill bear against a part of the machine frame. In this way the screw 21is operated gradually to feed the tool radially across the face to beplaned.

Having thus described out invention, what we claim as new and desire tosecure by Letters Patent, is

1. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said tool holder eitheroutwardly or inwardly, means carried by said head and movable in onedirection for operating said feeding means, a pivoted bracketintermediate said operating and feeding means, gears carried by saidbracket and meshing with gears on said operating and feeding means andshiftable by the movement of said bracket on its pivot to transmitmotion from said operating means to said feeding means in eitherdirection, and automatically locking means for retaining said bracket ineither transmitting position or in an intermediate position with saidgears inactive.

2. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said tool holder eitheroutwardly or inwardly, means carried said head and movable in onedirection for operating said feeding means, a pivoted bracketintermediate said operating and feeding means, gears carried by saidbracket and meshing with gears on said operating and feeding means andshiftable by the movement of said bracket on its pivot to transmitmotion from said operating means to said feeding means in eitherdirection, an arm controlling the position of said bracket, and aspring-pressed pin carried by said arm and adapted to engage one of aseries of apertures in the head forretaining said gears in eithertransmitting position or in an intermediate inactive position.

3. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said tool holder eitheroutwardly or inwardly, a feed wheel in said head adapted to be actuatedstep by step in one direction, a bracket pivoted upon the axis of saidfeed wheel, a gear fixed to and movable with said feed wheel, two gearscarried by said bracket constantly in mesh with each other, and oneconstantly in mesh with said feed wheel gear, and a gear connected withsaid feeding means with which either of said bracket gears is adapted tobe brought into mesh by the movement of said bracket, whereby the motionof said feed wheel may be transmitted to said feeding means gear ineither direction as desired.

4. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, a feed screw in said head engaging said toolholder for moving the same either outwardly or inwardly, a feed wheel insaid head adapted to be actuated step by step in one direction, abracket pivoted upon the axis of said feed wheel, a gear fixed to andmovable with said .gear wheel,-two gears carried by said bracketconstantly in mesh with each other and one constantly in mesh with saidfeed wheel gear, a gear connected with said feed screw with which eitherof said bracket gears is adapted to be brought into mesh by the movementof said bracket, whereby the inotion of said feed wheel may betransmitted to said feed screw gear in either direction as desired, anarm controlling the position of said bracket, and a spring-pressed pincarried by said arm and adapted to engage one of a series of aperturesin the head for retaining said gears in either transmitting position orin an intermediate inactive position.

5. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, a feed wheel in said head adapted to beactuated by the movement of the head, means between said feed wheel andsaid tool holder for transmitting the motion of the former to thelatter, and a spring-pressed brake shoe adapted to contact with one faceof said feed wheel to check its movement.

6. A facing tool, comprising a rotary head, a tool holder mountedtherein, a too] holding sleeve adapted to receive a tool, and means foradjusting said sleeve and its tool longitudinally with respect to saidholder.

7 A facing tool, comprising a rotary head, a tool holder mountedtherein, a tool holding sleeve adapted to receive a tool,

means for adjusting said sleeve and its too] longitudinally with respectto said holder, and means for clamping said sleeve when so adjusted.

8. A facing tool, comprising a rotary head, a tool holder mountedtherein, a tool holding sleeve in said holder slotted in one side toreceive a tool and having rack teeth on its outer face, and a worm insaid holder engaging said rack teeth to adjust said sleeve and its toolin said holder.

9. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said tool holder, a toolholding sleeve in said holder slotted in one side to receive a tool, andmeans for adjusting said sleeve and its tool with respect to saidholder.

10. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said tool holder, a toolholding sleeve in said holder slotted in one side to receive a tool andhaving rack teeth in its outer face, and a pinion in said holderengaging said rack teeth to adjust said sleeve and its tool in saidholder.

11. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said tool holder, a toolholding sleeve in said holder slotted in one side to receive a tool andhaving rack teeth in its outer face, a pinion in said holder engagingsaid rack teeth to adjust said sleeve and its tool in said holder, andmeans for clamping said sleeve when so adjusted.

12. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said too] holder, a toothedfeed wheel in said head for operating said tool holder feeding meansstep by step, spring-pressed plungers for operating said feed wheel stepby step, and means associated with each of said plungers for maintainingit out of operative position when desired.

13. A facing tool, comprising a rotary head, a tool holder mounted andmovable radially therein, means for feeding said too] holder, a toothedfeed wheel in said head for'operating said tool holder feeding meansstep by step, and a plurality of means for operating said toothed feedwheel step by step each comprising a plug mounted in a portion of thedevice adapted to be maintained against rotation, a spring-pressedplunger in said plug, a finger piece for Withdrawing said plungeragainst said spring tension, and a pin on said finger piece adapted toenter an aperture in said plug to permit said plunger to project intooperative position, or when withdrawn and turned to contact with theouter face of said plug to maintain said plunger with drawn ininoperative position.

14. A facing tool, comprising a rotary head, a spindle carrying saidhead. an aperture in its forward end to receive a pilot or center boreshank, said spindle being provided with a bayonet joint adapted toCopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

